Q345 steel yog dab tsi?
A: Q345 yog qhov qis - alloy siab - lub zog steel qauv. Q yog lub zog tawm los, thiab 345 qhia tias lub zog tawm los Ntau dua lossis sib npaug rau 345 MPa (tsawg dua lossis sib npaug ntawm 16mm thickness). Nws muaj cov cuab yeej zoo txhua yam, lub zog siab, thiab zoo heev toughness thiab weldability.
Q345 feem ntau siv hauv cov tsev txhab nyiaj dab tsi?
A: Feem ntau siv qib Q345B, Q345C, thiab Q345D. Qib B (20℃cuam tshuam tsis kam), Qib C (0℃), thiab Qib D (-20 degree) yog siv rau kev thauj khoom-cov kabmob, av qeeg- tiv taus, thiab qhov kub thiab txias.
Q345 vs Q235: Vim li cas Q345 thiaj xaiv rau cov tsev txhab nyiaj?
A: Q345 muaj kwv yees li 30% -50% siab zog dua Q235. Nyob rau hauv tib lub load, nws muaj ib tug me me cross-section thiab yog sib dua (txo 15-30%), kev txhim kho av qeeg, blast resistance, thiab cuam tshuam, ua tau raws li cov kev ruaj ntseg siab ntawm cov tsev txhab nyiaj.
Lub zog ntawm Q345 hloov nrog tuab li cas? A: Lub zog txo me ntsis nrog thickness:
Tsawg dua lossis sib npaug rau 16mm: Ntau dua lossis sib npaug rau 345MPa
16-40mm: Ntau dua lossis sib npaug rau 335MPa
40-63mm: Ntau dua lossis sib npaug rau 325MPa
63-100mm: Ntau dua lossis sib npaug rau 315MPa
Dab tsi yog cov lus qhia tshwj xeeb rau Q345 steel hauv kev tsim txhab nyiaj?
A: Hlau daim hlau 8-50mm tuab, H-beams, I-beams, lub kaum sab xis steel, round steel, thiab seamless kav, siv rau kab teeb, kab, kev txhawb nqa, txee, vault reinforcement, thiab tiv thaiv cov qauv.